Elastic insole



T. KRAP Patented `lan. 13, 1925. l

TEODORO KRAE, OF MEXICO. MEXIGO.

ELASTIG IN SOLE Application filed September 23, 192 2. Serial No.590,023.

To all whom z't may concern:

Be it known that I, Tnonono KRAP, a citizen of Germany, residing atMexico city, Federal District, Republic of Mexico, have invented acertain. new and useful Elastic Insole, of which the following is aspecification.

The invention relates to thin insoles to be worn within the socks `orstockings, and the object of the invention is to provide a simple,easily applied and inexpensive insole having the required'elasticity tomold automatically to the sole of the foot, and having absorbent andother qualities sby which perspiration and exudations are absorbed andthe foot protected from exterior cold and moisture, and thesensitiveness and tendency of the foot to perspire is reduced.

The invention consists in certain novel features and `details ofconstruction and arrangement by which the above and other objects areattained, to be hereinafter described and claimed.

The accompanying drawings form a part of this specification and show theinvention as it hasbeen carried out in practice.

Figure 1 is a plan or face view of a simple form of the insole beforefolding and application within the sock or stocking.

Figure 2 is a corresponding view showing the same in the partiallyfolded condition.

F igure 3 is a side view of the same after application and use.

Figure 4 is a plan view of a supplemental insole to be superposed uponthe insole shown in Figure 1.

Figure 5 is a section through the double 'insole thus formed, taken onthe line 5-5 in Figure 4.

Referring'to Figures 1, 2 and 3, the insole consists of a rectangularstrip of long fibre paper corrugated, rppled, or craped transversely,having a body portion 10 of the same width as the foot of the wearer atits widest part and somewhat longer than the foot.

In applying the insole the wearer holds it extended upon the bared soleofthe foot with portions projecting slightly beyond the latter at thetoes and heel. The excess length at the front is folded over upon thetoes and while thus held is inserted within the sock which has beenpartially turned to facilitate such insertion; the sock is then drawnupon the foot and the excess length at the heel folded automaticallyupon the latter.

In order to avoid an excess ofmaterial at the toes, a corner at theoutside of the insole is removed by :in angular cut as 11 so that nfolding the paper upon the toes a pocket oo is formed conforming to thecontour of the toes without excessive thickness at any part. The paperis of such character as to resist wear and by reason of the transversecrinkles or corrugatons, is elastic in the direction of the length ofthe foot, and has the property of absorbing dampness such as the naturalexudations of the foot when confined in the shoe.

By moderately saturatingthe insole with paraffine the foot is protectedagainst the noisture of the` ground, and in some instances the upperface of the insole is given a thin coating of tallow which may ifpreferred be medicated, and which tends to soften the skin'of 'thefoot-sole and effect a cure of excessive foot perspiration. When usingthe paraffined insole it is preferable to employ a second insole, notparaffined, to lie next the sole of-the foot and thus 8 lessen thefeeling of cold due to the paraffine. y g

The most complete and eficient form of the invention is jshown inFigures 4 and 5 and is designed to meet the exlgencies of the 8 Whenwalking these varation's in size are continuous and the length furtherincreased l by the upward curvature of the toes followed by a returntothe horizontal or plane position and a subscquent shrinking. Thesemovements are not prevented by the shoes and the flcxibility of theleather formin'g the shoe-upper even permits the curvature of the toes,but the shoe-sole retains its form and size and a continuous frictonresults between the sole of the shoe and the sole of the 100.

foot which is not suficiently met by the sock and causes wear of thelatter. The longitudinal elasticity of the single insole, due to thetransverse corrugation's, is sufiicient to meet the rubbing produced bythe successive changes in the length of the foot, which are theimportant variations, but does not pro- Vide for the continuous changes-in width.

`The form shown in these Figures 4 and 5 provides for both types ofvariatons. This is accomplished by superposing upon an insole 10 havingtransverse corrugatons a second insole 12 having its corrugationsarranged longitudinally soas to expand and contract transversely orlaterally, and in order that the effects of the elasticity of the twoinsoles shall not counteract eachrother the upper insole 12 is providedwith two slits or cuts 13 and 14, the former before the two points ofsupportfor the foot, as at the root of the toes, and the other in themiddle between the ball of the heel and those two points of support,that is, under the arch of the foot.

Thus arranged the lower insole 10 follows' perfectly the movements ofthe foot in the longitudinal di'rection, while the upper in- Sole 12follows perfectly the movements of the foot in the transversaldireetion, with correspon'dingly beneficial effects upon the `ness andfatigueof the soles of the feet, especially when treated with a thincoatingof tallow as above. described. They prevent the formation of'callousness, and prolong the useful life of the socks and stockings bylessening the frictional wear to which they aresubjected and by avoidingthe deterioration due to moisturecaused by perspiration.

I claim 1-- p 1. An insole comprising two superposed layers ofcorrugated paper having the corrugations of one layer extendingtransversely andthose of the other longitudinally of such insole, andadapted to be worn within the sock or stocking. t A' 2. An insolecomprising two superposed layers of corrngated paper having thecorrugations of the lower layer extonding transversely of such insole,and' the corrugations of said 'upper layer extendng longitudinally ofsuch insole, sad upper layer being elastic laterally.

3; An insole consistingof a rectangular strip of corrugated paper havinga body portion of substantially the same widthas the widest part of thefoot of the wearer and slightly longer than the foot, there being anangularlycut portion at the toe foldable to form a 'toe-receivingpocket, the excess length being automatically foldable upon the heel asthe sock is drawn'upon the foot.

4. An insole consisting of a reetangular strip of corrugated paperhaving a body portion of substantially the same wdth as` the widest partof the foot of the wearer and slightly longer than the foot, the excess'length being automatically foldable upon the heel as the sock is drawnupon the foot, the

strip having at the toe-end a portion removed at an angle to the lengthto avoid excess of material over the toes.

In testimony that I claim the invention above set forth I afix mysignature hereto. TEODORO KRAP.

